Browse Prior Art Database

Unauthorized Copy Protection by Chip ID Recognition

IP.com Disclosure Number: IPCOM000123758D
Original Publication Date: 1999-Apr-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Horikoshi, H: AUTHOR [+3]

Abstract

Disclosed is the protection method of unauthorized copy of DVD media through a non-copy-protected digital TV encoder. There was a problem under the following condition. If the IIC address of the TV encoder chip with copy protection is same as the other chip without copy protection, anyone can copy the digital contents of DVD illegally by replacing copy-protected encoder chip with non-copy-protected one.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Unauthorized Copy Protection by Chip ID Recognition

   Disclosed is the protection method of unauthorized copy of
DVD media through a non-copy-protected digital TV encoder.  There
was a problem under the following condition.  If the IIC address of
the TV encoder chip with copy protection is same as the other chip
without copy protection, anyone can copy the digital contents of DVD
illegally by replacing copy-protected encoder chip with
non-copy-protected one.

   In order to prevent it, POST(Power On Self Test) code
checks the chip ID.  Since the chip ID is different between
non-copy-protected encoder and copy-protected one, even if the IIC
address is same between them.  If the chip ID is not the one of
copy-protected chip, POST error(indicating unauthorized chip
replacement) is displayed on the screen of the machine.  So no one
can use the machine and copy the digital contents of DVD.  *p.  Fig.1
shows a H/W diagram.  Fig.2 shows a flow chart.